(which was proposed) at first, but he who objects in part (must contradict) that which is universal, of which the proposition is stated, as that there is not the same science of the known, and the unknown, for the contraries are universal with reference, to these. The third figure is also produced, for what is particularly assumed is the middle, for instance, the known and the unknown; as from what we may infer a contrary syllogistically, from the same we endeavour to urge objections. Wherefore we adduce then (objections) from these figures only, for in these alone opposite syllogisms are constructed, since we cannot conclude affirmatively through the middle figure. Moreover, even if it were (possible), yet the (objection), in the middle figure would require more (extensive discussion), as if any one should not admit A to be present with B, because C is not consequent to it, (B). For this is manifest through other propositions, the objection however must not be diverted to other things, but should forthwith have the other proposition apparent, wherefore also from this figure alone there is not a sign.
We must consider also other objections, as those adduced from the contrary, from the similar, and from what is according to opinion, also whether it is possible to assume a particular objection from the first, or a negative from the middle figure.
